Fig. 1: Twelve-sided vacuum cell with ultralow birefringence. A large-NA objective is installed in its interior.
Optical access to the ultra-high vacuum environment is an essential requirement for atom manipulation experiments and is typically realised by glass cells. Our transport scheme is based on polarisation additionally requiring additionally a low stress induced birefringence which is not fulfilled by usual cells. Therefore, we developed a dodecagonal (12-sided) glass cell made of SF-57 glass from Schott®.
It features:
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polarization extinction < 1:107
(patent pending) - double-sided anti-reflective coating
- large optical access (12 sides)
- double-sided anti-reflective coating
- pressure <1x10-10 mbar
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compact geometry
(height 150 mm, inner diam. 40mm, outer diam. 68mm)
You can learn more in our manuscript entitled "Ultra-low birefringence dodecagonal vacuum glass cell" which you can find in our publications.